Last night, Miley Cyrus got an astronomy lesson to go along with her brand new ink.

Cyrus, who tapped Sydney-based tattoo artist Lauren Winzer to get a teeny tatt of a planet to add to the 23 other tattoos she already has, is coming under fire for the caption beneath her tattoo show-and-tell.

If you'll look closely at the tattoo she got, it's not actually Jupiter, but the visibly ringed Saturn. Scandal.

Miley Cyrus / Instagram

Commenters were quick to point out that the planet she has on her arm is not the one she said she has on her arm, leaving harsh words like "that's really Saturn, Miley" and "finish 1st grade" on her feed. Rude.

However, one sympathetic fan pointed out that "no one is perfect," which is sweet, considering that maybe Miley was tired or something and didn't actually just get the wrong planet tattooed permanently on her arm like some rude folks think.

"Stoner as fuck." This may explain the mis-captioning of her new body art, yes. But hopefully it doesn't explain her state of mind when telling the artist which planet she actually wanted. We feel for you, Miley.